for(int j=1;j<=l;j++)/
by JRzyh @ 2020-04-06 20:22:02
```cpp
#include<iostream>
using namespace std;
int main()
{
int size,i,j,a,count=0,transfer;
cin>>size>>a;
bool tree[size+1];
int area[a][2];
for(i=0;i<size+1;i++)tree[i]=true;
for(i=0;i<a;i++)
{
for(j=0;j<2;j++)
{
cin>>transfer;
area[i][j]=transfer;
}
}
for(i=0;i<a;i++)
{
for(j=area[i][0];j<=area[i][1];j++)tree[j]=false;
}
for(i=0;i<size+1;i++)
{
if(tree[i]==true)count++;
}
cout<<count;
return 0;
}
```
很久很久以前写的代码
by Micro_Seven @ 2020-04-06 20:22:28
@[【昴星团】](/user/335552) if(a[metro1]==0) continue;和if(a[j]==0) continue;可以去掉。
by JRzyh @ 2020-04-06 20:23:40
@[Micro_Seven](/user/291358) 您确定能bool tree[size+1];？
by JRzyh @ 2020-04-06 20:24:17
@[【昴星团】](/user/335552) 以后要注意for的开始结束点。
by JRzyh @ 2020-04-06 20:25:27
@[Zhaoyuhang2008](/user/242524) 当时这个代码A了
by Micro_Seven @ 2020-04-06 20:25:50
0 到 L 有 L + 1 个整数，不是 L 个。
by ud2_ @ 2020-04-06 20:27:42
@[Micro_Seven](/user/291358) noip可能会CE
by JRzyh @ 2020-04-06 20:27:46
@[Zhaoyuhang2008](/user/242524) 2333
by Micro_Seven @ 2020-04-06 20:28:08
@[Micro_Seven](/user/291358) ?
by JRzyh @ 2020-04-06 20:28:28